class_docstr: Base object for the node of a tree. 
code: def __cmp__(self, other):
      return cmp(other.upp_bound, self.upp_bound)
  
imports: from __future__ import division
  from functools import total_ordering
  from argparse import Namespace
  import numpy
  from .general_utils import map_to_bounds
label_desc: Use image node_id 2 for calling the Node obj's underlying member method code with example usage: obj.__cmp__(other) and returns: cmp